Need better performance for long/steep hills, faster on flat ground. Ideas?

I have a China (ZoomBicycles) 66cc 2-stroke engine, and I'm not entirely satisfied with the performance of it. Stock drive gear (44t I think).

My plans are to get a new plug (not sure which to get?), better carb, and better exhaust (possibly expansion pipe). I need to keep the 44t sproket because I travel up a lot of hills. Don't want a 36t because of the hills, but don't want a 50t that will lower the top speed.

I was thinking about the NT Speed carb. Has anyone tried it? Is it worth the money? Spooky Tooth has it for $25.


So if anyone could help me out, I would appreciate it. The bike is just not making enough power for my needs. I figure between a better carburetor, better spark plug, and a better exhaust pipe, it could perform how I would like it to.

I ran a gallon of 20:1, then 24:1, then 32:1 most recently. Would changing to 40:1 or 50:1 be more beneficial? I'm assuming it's broken in, I've had 5 tanks of gas through it.

(Please keep in mind I do not have a Dremel tool or drill to do any porting work. Just basic hand tools and not much money. Please keep these factors in mind)

Thanks!

It's just a single speed bike. Cranbrook with ZoomBicycles motor.

Really looking for Carb, Exhaust, or other inexpensive performance recommendations. I already ordered my B5HS spark plug. I just need a little more kick, or I'm chopping up my new factory muffler again. Haha